TravisCI: How to allow failures for environment variable

Question

How to allow failures for builds having specific environment variable value?

For example:

.travis.yml:

env:
  - TEST_GROUP=Smoke
  - TEST_GROUP=other # How to allow failures for this variable?
matrix:
  allow_failures:
    - TEST_GROUP=other # This does not work

Answer 1

You need to explicitly reference env in the allow_failures section:

matrix:
  allow_failures:
    - env: TEST_GROUP=other

Answer 2

@roidrage's answer works for me.

When using multiple env variables in a single matrix dimension, env variables have to be combined like this:

env:
- TEST_GROUP=Smoke TEST_ENV=airport
- TEST_GROUP=other TEST_ENV=outside
matrix:
  allow_failures:
  - env: TEST_GROUP=other TEST_ENV=outside